The objective consists in finding the PH of •acidic water•distilled water•tap water

The tools and materials are:•Fourier accessories•3 beakers•netbook•distilled water•acidic water•tap water

The pH measures the acidity of a solution.The pH scale ranges:•from 0 to 14;•from 0 to 7 for acid ;•from 7 to 14 for basic ;•7 is the value of neutrality .

Ph distilled water

6,700

6,800

6,900

7,000

7,100

7,200

7,300

7,400

7,500

0 1 2 3 4 5 6 7 8 9

Time (s)

Ph distilled water

This graph represents the ph of distilled water.

The value of pH varies from 7 to 7.4: the distilled water is basic.

Ph tap water

7,2

7,25

7,3

7,35

7,4

7,45

0 1 2 3 4 5 6 7 8 9

Time (s)

Ph tap water

This graph represents the ph of tap water.

The value of pH varies from 7.3 to 7.4: the distilled water is basic.

Ph acid water

2,13

2,14

2,15

2,16

2,17

2,18

2,19

2,2

2,21

2,22

2,23

0 1 2 3 4 5 6 7 8 9

Time (s)

Ph acid water

This graph represents the ph of acid water.

The value of pH varies from 2.22 to 2.16: the distilled water is acid.

The distilled water has the ph of 7, the tap water has ph between 7 to 8 and acid water has ph 2.The distilled and acid water decrease in time, while the ph of tap water increases .

We have used the acid water solution instead of rainwater because it was impossible to collect real samples of rainwater.

Ph sensor